평행봉 Tippelt 기술 숙련도에 따른 운동역학적 비교

Abstract

This study conducts biomechanical comparison according to Tippelt technique proficiency in parallel bars in order to examine the chief factors of the movement and provide foundational data for conducting the technique. Two persons who can accomplish the motion perfectly were classified as the excellent athletes(E), and the other two persons who have the cause of subtract points during motion were classified as the group of non-excellent athletes(NE), so 3D motion analysis and comparison analysis of muscle activity between pectoralis major, trapezius, deltoid, upper abdominal, lower abdominal, rectus femoris, erector spinae, litssimus doris etc. were conducted. It is shown that E takes more time in the swing or flight phase than NE. While E moves the center of mass forward rapidly and shows great back and forth shift width, NE indicates great vertical shift width with the fast vertical movement. It is also shown that although NE shows greater flection and extension width of hip joint and the maximum angle speed of hip joint and trunk slope in the swing phase, E indicates greater flection width of hip joint and the maximum angle speed of hip joint and trunk slope in the flight phase. According to the result of analyzing muscle activities, in the swing phase, E shows greatest upper and lower rectus abdominal muscle activities while NE indicates greatest deltoid and lower abdominal muscle activities. In the flight phase, E shows greatest upper rectus abdominal muscle and rectus femoris muscle activities whereas NE indicates greatest deltoid and upper abdominal muscle activities. In order to enhance the completeness of Tippelt technique, it is necessary to flex hip joint with the descent using rectus femoris muscle rather than the upper body at the descent swing and move forward greatly to induce backspin movement. In the flight phase, it is also shown that it is needed to conduct movement drawing the lower body instead of raising the upper body.